How many treads would you use for a u-shaped stair

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Given a multistory building with a floor-to-floor height of 10 ft and an optimal riser height of 7 in., how many treads would you use for a U-shaped stair with a mid-landing between floors? (The landing is not counted as a tread.)

a. 15

b. 16

c. 17

d. 18

e. None of the above

Reference no: EM131179373

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